Precious stone



FIG. 1 is a top, front, right side perspective view of the precious stone;

FIG. 2 is a front side elevational view thereof, the back, left and right side elevational views being identical thereto;

FIG. 3 is a top plan view thereof, and,

FIG. 4 is a bottom plan view thereof. 

CLAIM The ornamental design for a precious stone, as shown and described. 